Method of making containers



Aug. 7, 1945. M. o. KUHN 2,381,386

METHOD OF MAKING CONTAINERS Original Filed 001;. 4, 1940 2 Sheets-Sheet l IIIIIIIIIIIIIII1/4 gjwwm I MAX 0. KUHN Aug. 7, 1945. M. o. KUHN ,381,386

METHOD OF MAKING CONTAINERS I Original Filed Oct. 4, 1940 2 Sheets-Sheet 2 INVENTOR MAX 0. KUHN ATTORNEYS Patented Aug. 7, 1945 METHOD OF MAKING CONTAINERS Max 0. Kuhn, Cuyahoga Falls, Ohio, assignor to The Firestone Tire & Rubber Company, Akron Ohio, a corporation of Ohio Original application October 4, 194b, Serial No.

359,673, now Patent No. 1944. Divided and this applicatio May 9, 1942,

Serial No. 442,376

' 4 Claims.

This invention relates to methods of making containers, and more especially it relates to improved procedure for the manufacture of single walled metallic containers.

The present application is a division of applicant's prior application, Serial. 0. 359,673, flied October 4, 1940, for Container, now matured to Patent No. 2,354,42 issued July 5, 1944.

Many types of containers have heretofore been made with a majority of the containers being of the double wall type. One principal reason for making containers double walled is that it is difflcult to produce single walled containers that retain their shape when subjected to the rough use which containers normally receive. Another reason is that most single walled containers enlarge when containing a fluid under pressure.

These disadvantages of single wall containers are dimcult to overcome and have forced most manufacturers to produce double walled containers, whereas obviously double walled containers weigh andcostmore than single walled containers.

The general object of the present invention is to provide a method of manufacturing an improved type of container.

A further object of the invention is to provide in an improved manner for the manufacture of a sturdy, constant volume, light weight container.

Another object of the invention is to provide a single wall container having desirable physical properties.

More specifically, the invention aims to provide a single wall container of improved construction at the bung opening thereof.

Other objects of the invention will be manifest from the following specification, particular reference being directed to the accompan drawings, of which:

Fig. 1 is an elevation, partly in section, of a container produced in accordance with the method of the invention;

Fig. 2 is a fragmentary sectional view, on a larger scale, showing how a bung unit, comprising cut-out section and a reinforcing plate therefor, are mounted in an opening in the wall of the container, which opening is the result of the Prior removal of the cut-out section;

Fig. 3 is a plan view of the construction of the bung opening of the container, as viewed from the exterior-thereof;

Fig. 4 is a section on the line 4-4 of Fig. 3;

Fig. 5 is a section on the line 5-5 of Fig. 3; and

Fig. 6 is a section on the line 85 of Fig. 4.

Referring to the drawings, there is shown a 2,354,425/ dated J I!!! 25,

' single walleld metallic container III which is made up of two cup-shaped container sections I i and l 1 that are united to the opposite edges or margins of a medially positioned container ring 52.

chimes l4 and I5 respectively formed at the respective ends thereof, the inner walls of said chimes being integral with indented spheroidally contoured heads 15 and II, respectively, of the container sections II and It. The upper head I5 is formed with a flattened region 2| that has a flanged opening 23 therein to receive any usual or desired tapping fixture (not shown). In like manner the lower container section i2 has a flat portion formed in the outer wall of its chime l5, which portion is formed with a flanged opening 25 to receive a tapping fixture (not shown). The lower head ll of the container is formed with a radially extending tapping trough 25 that is aligned with the opening 25. The trough 25 facilitates draining of the container through the tapping means in opening 28, and also serves to reinforce the end of the barrel. The container sections II and i2 are made by conventional drawing operations, and the ring 52 is formed by expanding a circular metal band to the desired contour. The container sections and ring are composed of a suitable metal such as stainless steel, and are united to each other by being butt welded together by the atomic hydrogen method.

The medial member 52 of the container has a complete centrally disposed circumferential band 5i formed therein, which band has rolling rings 53 and 54 adjacent the edges thereof. After the band 5| is formed, preferably by cold rolling it into the member 52, a section 55, that is substantially rectangular in projection, is cut therefrom by a suitable punch and die, a bung opening disposed centrally of the section preferably being punched therein during the cutting thereof. Next a relatively thin reinforcing plate 59 having a bung liner 56 secured thereto is secured to the concave or inner surface of the section 55 by spot welding. A reinforcing sput 5! is positioned around the bung liner 58 and the latter is inserted in .the bung opening formed in the section 55 before assembling the reinforcing plate with the latter, the outer end 55a of the bung liner extending through the bung aperture. Next, the margin of the plate 59 is trimmed to exact conformity with the margin of the section 55 the assembly then constituting a bung unit 58. Note that thecenter portion of theplate 59 is flat while the ends and sides thereof are out of the plane of the center portion and are contoured so as to fit snugly against the section 55. The bung unit 55 The container sections ii and I2 have double walled container.

is placed in the hole formed in the band Si by cutting section 85 therefrom and the inner edgeof the plate 58 is positioned fiush'with the inner edge dotted line in Figure 3 indicates the line of con-.

tact of the plate 59 with the section 55. In securing the bung unit to the container, the plate 59 is fused to the section 55 at the edge thereof and both the plate and section are fused to the After the bung unit is mounted as described, then a container section II or sections II, I! can be secured to the member 52 to form a container therefrom.

If the section 55 does not readily fit back into the opening produced by cutting it from the band iii, the edges of the section may be trimmed slightly to facilitate repositioning the section. Or, the band 5| may be heated, for example, by placing it on a hot welding jig whereby the hole in the band 5| is enlarged slightly andadapted to receive the section 55.

the edges of said reinforcing plate and segment and forming a bung at said bung apertures to make a bung unit, positioning the bung unit in the hole formed in said annular band with the inner surfaces of the bung unit and annular band being flush, and welding the bang unit to the medial container section and thereafter welding the end sections of the container thereto to comcontainer section.

The container of the invention is provided with in place without forming a protuberance on thecontainer. Also, this bung constructionpermits complete drainage of the container. No crevices or cracks are formed on the inner surface of the container, since it is primarily used as a beverage I container and it is essential that the container can be kept clean easily. Preferably all of the component parts of the container of the invention are made from stainless steel, except for the reinforcing sputs which may be made from any suitable material, such as carbon steel. -A further feature of the container is that it does not expand appreciably when it is filled under internal pressure. Hence, no liquid is expelled when the filling pressure is removed after the container is filled, and the volumetric capacity of the container does not vary substantially under different degrees of internal pressure.

It will be seen that a sturdy easily constructed container has been provided by the invention and that the objects thereof have been realized.

Modification may be resorted to without departing from the spirit of the invention or the scope thereof as defined in the appended claims, which are not limited to described.

What is claimed is: v

1. That method of manufacturing a single walled metallic container comprising forming end sections and a medial section for the container,- rolling an annular band into the medial container section, forming a bung aperture in said medial section, cutting a segment from the annular band, forming a reinforcing plate of the same size and contour as said segment and adapted to fit against the inner surface thereof,

forming a bung aperture in said plate, aligning.

the exact procedure- 3. In a. method of manufacturing a single wall metallic container, the steps of forming a bung aperture in a cylindrical container section and cutting a plate from the container section with the bung aperture located therein, forming a reinforcing plate having the same general contour as the plate cut from the container section and having a bung liner extending radially outwardly therefrom, assembling said plates in confronting relation including inserting the bung liner in the bung aperture from the concave side thereof, locally banding the cutout plate to the reinforcing'plate, trimming the edges of the "reinforcing plate to make them flush with the edges *of the cutout plate, positioning the assembled unit in the aperture in the container section with the inner surface of the edges of .the reinforcing plate fiush with the inner surface to the adjacent surface of the cutout plate, and

incorporating the section in a container.

4. In the manufacture of a single wall metallic container comprising an arcuate container section, the steps of cutting a plate having a bung aperture therein from the container section, forming a reinforcing plate having the same general marginal contour as the cutout plate but having a substantially fiat medial portion, there being a hung liner secured to. the medial portion of the reinforcing plate and a sput positioned about the bung liner, placing the cutout plate and reinforcing plate in juxtaposition so that the marginal portions thereof are in abutting relation and the medial portions thereof are in spaced apart relation, the bung liner extending through the bung. aperture in the cutout plate, locally bonding the reinforcing plate to the cutout plate to provide a bung unit, mounting the unit in the aperture in the container section from which thecutout plate previously had been removed, progressively'fusing the edges of the cutout plate and reinforcing plate of the unit to each other and to the container section, and then securing the projecting end portion of the bung liner to the cutout plate.

MAX 0. KUHN. 

